Exploring Ecosystem Concepts

What does the term 'ecosystem' encompass?

• None of the above

• Only living organisms

• Only nonliving elements

• Both living organisms and nonliving elements

What defines a biome?

• A single ecosystem

• A community of plants and animals

• Similar climate and species across ecosystems

• Different climates without specific species

What is the typical salt level in freshwater ecosystems?

• 50%

• Less than 1%

• More than 10%

• Exactly 5%

Which biome covers the largest percentage of the Earth's surface?

• Desert

• Marine

• Freshwater

• Forest

What is a distinctive feature of marine biomes?

• Frozen waters

• No animal life

• High salt levels

• Low salt levels

How much rain does a desert typically receive annually?

• 500 cm

• More than 200 cm

• Less than 50 cm

• Exactly 100 cm

What do trees exhale?

• Carbon dioxide

• Nitrogen

• Hydrogen

• Oxygen

What is a key environmental role of forests?

• Absorbing nitrogen

• Absorbing oxygen

• Producing carbon dioxide

• Producing oxygen

What type of climate do savanna grasslands typically have?

• Humid and rainy

• Warm or tropical

• Cold and dry

• Variable temperatures

Which biome is known for having very low temperatures and little rain?

• Grassland

• Tundra

• Desert

• Forest